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Lower than expected throughput when altering number of concurrnet ios per raid group in ONTAP

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Category:
fas-systems
Specialty:
MetroCluster
Last Updated:

Helpful 

Applies to

  • FAS/ AFF
  • SyncMirror

Issue

When an active resync is running on an aggregate modifying 'num_concurrent_ios_per_rg' from a lower value to a higher vaule and back down, the throughput IOs drops bellow the inicial throughput before modified. Increasing the IOs per raid group does not increase the throughput.
 

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